mctammany



(No Model.) 2 Sheets-Shem. l.

J. MGTAMMANY, Jr.

MECHANICAL MUSICAL INSTRUMENT.

No. 273,120. Patented Feb.-2'7,1888.

Inventor.

(No Model.) 2-Sheets-Sheet 2. J. MGTAMMANY, Jr.

MBGHANIGAL MUSICAL INSTRUMENT. No. 273,120. Patented Peb.27, 1883.

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UNITED STATES FATENT Orrrcs.

JOHN MOTAMMANY, JR, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO ALEXANDERMOTAMMANY, OF SAME PLACE.

MECHANiCAL MUSlGAL iNSTRdMENT.

SPECIFICATION forming part of Letters l aterit No. 273,120, datedFebruary 27, 1883.

' Application filed August 30, 1881. (No model.)

to enable others skilled in the art to which it appertains to make anduse the same, reference being had to the accompanying drawings, and toletters or figures of reference marked thereon, which form a part ofthis specification.

This invention relates to automatic musical instruments, and moreespecially to the winding and feedingmechanism for the perforatedmusic-sheets used therein.

The said-invention consists in certain improvements in the devices forwinding the music-sheet, the devices for feeding the same, and themovable rack to which they are attached, which improvements arehereinafter set forth and claimed.

In the accompanying drawings, Figure 1 represents a plan view of amachine embodying my invention. Fig. 2 represents a detail perspectiveview of the crank-shaft which feeds the music-sheet, with its pulley andspring- 0 pressed friction-cams attached. Fig. 3 represents aperspective view of the winding-roll for the musicsheet and the recessedhub or -disk attached thereto. Fig.4 represents an end view of theguide-rack or feed-rack for the music-sheet. Fig. 5 represents avertical section through the said rack and the feed-roll and presser-barattached thereto, taken longitudinally of the machine and through one ofthe springs of said bar. Fig. 6 represents a plan view, in detail, ofthe presser-bar, its supporting cross-bar, and the springs whereby it isattached thereto.

In said drawings, A designates the casing of the machine, having sidewalls A A erected on the top thereof; 13, the lower feed-roll of l themusic-sheet, having a belt-pulley, B, at-

tached to the protruding end of its shaft; C, the rewindingroll,provided with a rewindin crank, O, and D the tubular winding-roll for 5the music-sheet. With the exception of the last-named roll, theabovementioned parts are constructed substantially in the usual manner,and require no particular description. The tubular roll I) is of spoolform, having fixed disks d d at each end, to one of which a thick hub ordisk, E, is attached. This disk E has in its outer face a circularrecess, E, surrounded by a rim, E and communicating by a central passagewith the interior of said tubular roll.

h designates a driving-shatter spindlelonger than roll I), and havingthe latter loosely sleeved upon it, so as to allow motion of said rollon said shaft, as hereinafter stated. On one end of said shaft F acrankhaudlc, F, is attached, and on the other (the one near recesseddisk E) a grooved pulley, F, which is belted lo pulley B by heltf, sothat the oporation of crank-handle F drives the lower feed-roll, i3, andthus feeds forward the musicsheet, which latter is designated as X. Asmall circular offset, G, is formed on the inner face of pulley F, beingconcentric therewith, and to the said inner face two curved frictioncams or bars, H H, are pivoted at one end of each, their other endsbeing forced outward beyond the periphery of said pulley by the actionof expansion-springs l1. h, which set into sockets in the periphery ofoffset G and ear against the inner faces of the free ends of said curvedbars or cams. Said offset and cams or bars set into recess E of disk E,so that said springs force said cams outward against the inner face ofcircular rim E of said disk. The free ends of said cams or bars areinclined rather abruptly, and clutch against said rim E as said shaft isturned forward, so as to cause said roll I) to turn with said shaft.Thus the same motion feeds and winds the music-sheet X. As the roll D isconsiderably larger in diameter than the shaft of the lower feed-roll,it is evident that when the motion of the crank F is sufficiently 'apidto properly operate said feed-roll it will cause said winding-roll D tostrain said musio sheet and prohably to tear it, unless some yielding orcompensatingdeviceis employed. This is the purpose and function of thefriction cams or bars hcreinbefore described. When the strain of themusic-sheet becomes excessive it afiords resistance enough to overcomethe friction of said cams, and holds the winding-roll D motionless untilthe operation of shaft F has fed forward a sufficient length of the music-sheet to relieve said strain.

I designates the feed-rack or guide-rack, to whichis attached the upperfeed-roll, J. Hitherto said rack has ordinarily been pivoted to the sidewalls A at its lower rear corners, and therefore has required somespecial device to counteract its tendency to rise while the musicsheetwas fed forward through and by the feed-rolls, or, more exactly, throughsaid rolls and by the lower one of the pair. I however improve on thisconstruction by locating the pintles M (a pivot-rod may be substituted)at points immediately above the ends of the upper feed-roll when saidupper feed-roll is in position to operate, and also vertically above thejournals of the lower t'eedroll. As the pivots of the frame or rack arethen in the same vertical plane that passes longitudinally through theaxes of the feed-rolls, it is evident that the passage of themusic-sheet through the latter will not exert any leverage on the rack,so as to lift the upper feedroll. I also curve the lower rear corners ofthe side walls J of said rack, as shown at j, but leave thecorresponding front corners thereof angular, so that the parts of theside pieces proximate thereto are flat against the music-sheet to thevery corner, as shown at In this connection, it should be remarked, Iuse theterm front to signify the face of the rack where the music-sheetis received and rear that where it is delivered. The result of thisconstruction is that as the music-sheet is fed through the rack it doesnot lift the rack in the least, but merely causes the spring-pressedupper feed-roll to rise slightly against such pressure toward thepivotal points of the rack. The construction of the end pieces, J, atthe front corners, j will prevent any upward motion of the rack itself.When the motion of the music-sheet is reversed by rewinding, thecurvature at j will allow said rack to readily tilt and free saidmusic-sheet from all impediment. Hitherto I have generally used apresser-roll to hold said music-sheet down to its work, though a barwithout rotation has som etimes been employed. I find, however, that thebest practical results are obtained by the improvedform of drag-bardesignated K, which has its bottom curved and beveled, as shown at k,and is connected by springs K K to a fixed horizontal bar, L, secured ona fixed vertical wall, M, which closes the rack at its front. This dragdoes not yield too easily, as most pressure-rolls do, and therefore willnot allow the music-sheet X to crumple or fold between it and thefeed-rolls. It has, however, a certain curvilinear yielding motion,owing to the shape of its bottom and to its elastic attachment, whichavoids all danger of rnsping or unduly retarding the music-sheet, asmight he done by a presser-bar having a flat bottom and vertical motiononly.

N designates the rear wall of the rack l, which is extended down so nearto the feedroll B as practically to prevent the escape of sound betweenthem or reduce such escaping sound to a very slight volume. The fourwalls J J, M, and N of said rack form, with the top thereof, asound-chamber, which receives the vibrations of air ascending throughthe reedducts. In the top of the said rack an opening is made. and thismay be supplied with a swell or crescendo, if desired. I

Of course the amount of friction exerted by the cams hereinbeforedescribed maybe varied by changingthe springs for stronger or weakerones or bylooseningor tighteningsaid springs. The action of the drug oryielding-pressure bar may be similarly varied.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. In an automatic musical instrument, a tubular winding-roll having adisk or enlargement at one end, in combination with shaft within saidroll and a pair of pivoted springpressed cams attached to said shaft andbinding against said disk, for the purpose set forth.

2. In combination with pulley F having circular offset G, the cams orbars H, pivoted to said pulley, and forced outward by springs h h,socketed in said oflset, the shaft F, rolls 1) B, recessed disk E,pulley B, and the beltconmeeting said pulleys, substantially as setforth.

3. In an automatic musical instrument, a rack supporting the upperfeed-roll, in combination with the lower feed-roll, said rack beingpivoted at points in the transverse vertical plane which passes throughthe axis of the upper feed'roll, from end to end thereof, when thelatter is in position to operate.

4. In combination with the case of a musical instrument, a rack pivotedthereto at points above the feed-rolls, and having its lower rearcorners curved or rounded, substantially as and for the purpose setforth.

5. The drag K, curved at the bottom on one side, in combination with therack and springs connecting it thereto, for the purpose set forth.

In testimony whereofl affix my signature in presence of two witnesses.

JOHN li'lG'lTAlilMANY, J It.

\Vitnesses W. H. BABCOCK, EDWARD G. Sreenns.

IIO

